To use fuel from a fuel tank, you place the fuel nozzle on the fuel line coming out from the bottom of the tank and turn it on. The engine will run with this mixture and will run better with more fuel. First, depress the accelerator pedal to ignite the engine. Then turn the key to turn on the fuel pump. When you see the green light come on, unscrew the cap of your fuel line and insert it into your tank. Screw the top of your fuel line tight and press the top of your accelerator to start your car.